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• W4206435102 abstract "This article presents a new systematic technique for identifying voltage traveling waves (TWs) to determine the location of line faults in half-bridge modular multilevel converter-based high-voltage dc (HBMMC-HVdc) grids. In this technique, the buffered voltage signal frame around the fault-detection time is first scaled and then segmented via an optimization process. Finally, the incident/reflected TWs arrival times are obtained by executing a simple search algorithm on the reconstructed signal segments’ differences. This article describes how to use this technique in three forms of TW-based fault location schemes, including the single-ended scheme with known TW velocity, the double-ended scheme with known TW velocity, and the double-ended scheme with unknown TW velocity. The application results on a four-terminal HBMMC-HVdc grid simulated with exact component models show the proposed technique’s high capability and accuracy in all the three TW-based fault-location schemes. According to these results, the average fault-location errors are less than 0.5% for all the schemes. The numerical results also confirm that the proposed technique maintains its excellent performance, even in the face of close to terminal faults with distances down to 4 km, faults with high resistances up to <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$450 Omega $ </tex-math></inline-formula> , and noisy signals with signal-to-noise ratios down to 55 dB. Moreover, the comparison results confirm that the proposed approach is more tolerant of measurement noise than the wavelet transform." @default.
• W4206435102 created "2022-01-25" @default.
• W4206435102 creator A5067980890 @default.
• W4206435102 creator A5081671634 @default.
• W4206435102 date "2022-01-01" @default.
• W4206435102 modified "2023-10-16" @default.
• W4206435102 title "A Signal Segmentation Approach to Identify Incident/Reflected Traveling Waves for Fault Location in Half-Bridge MMC-HVdc Grids" @default.
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• W4206435102 doi "https://doi.org/10.1109/tim.2021.3139688" @default.
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